package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author tang
 * @create 2020-10-26
 */
@Controller
public class LoginControllor implements CommunityConstant {
    private static final Logger logger  = LoggerFactory.getLogger(LoginControllor.class);
    @Autowired
    private UserService userService;
    @Autowired
    private Producer kaptchaProducer;
    @Autowired
    private RedisTemplate redisTemplate;
    @Value("@{server.servlet.context-path}")
    private String contextPath;

    @GetMapping("/register")
    public String getRegisterPage(){
        return "/site/register";
    }

    @GetMapping("/login")
    public String getLoginPage(){
        return "/site/login";
    }

    @PostMapping("/register")
    public String register(Model model, User user) throws IllegalAccessException {
        Map<String,Object> map=userService.register(user);
        if (map ==null || map.isEmpty()){
            model.addAttribute("msg","注册成功，我们已经向您发送了一封激活邮件，请尽快激活");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else{
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }

    @GetMapping("/activation/{userId}/{code}")
    public String activation(Model model, @PathVariable("userId") int userId,@PathVariable("code") String code){
        int result =userService.activation(userId,code);
        if (result == ACTIVATION_SUCCESS){
            model.addAttribute("msg","激活成功，您的账号已经可以正常使用了");
            model.addAttribute("target","/login");
        }else if(result == ACTIVATION_REPEAT){
            model.addAttribute("msg","该账号已经被激活");
            model.addAttribute("target","/index");
        }else{
            model.addAttribute("msg","激活失败，您的激活码不正确");
            model.addAttribute("target","/index");
        }
        return "/site/operate-result";
    }


    /**
     *输出验证码
     */
    @GetMapping(path = "/kaptcha")
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/){
        //getkaptcha
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

        //kaptcha ---> session
//        session.setAttribute("kaptcha",text);
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner",kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);

        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);

        //to browser
        response.setContentType("image/png");
        try {
            OutputStream os =response.getOutputStream();
            ImageIO.write(image,"png",os);
        } catch (IOException e) {
            logger.error("生成验证码失败");
            e.printStackTrace();
        };

    }
    @RequestMapping(path = "/login", method = RequestMethod.POST)
    public String login(String username, String password, String code, boolean rememberme,
                        Model model, HttpServletResponse response,@CookieValue("kaptchaOwner") String kaptchaOwner) {
        // 检查验证码

        String kaptcha =null;

        if (StringUtils.isNotBlank(kaptchaOwner)){
            String redisKey =RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }

        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)) {
            model.addAttribute("codeMsg", "验证码不正确!");
            return "/site/login";
        }

        // 检查账号,密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")) {
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @GetMapping("/logout")
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        return "redirect:/index";
    }
}
